Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
  • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
  • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
  • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
  • A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
  • A61B17/8061—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates specially adapted for particular bones
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
  • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
  • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
  • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
  • A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
  • A61B17/809—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates with bone-penetrating elements, e.g. blades or prongs
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
  • A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
  • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
  • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
  • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
  • A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
  • A61B17/8095—Wedge osteotomy devices
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S606/00—Surgery
  • Y10S606/902—Cortical plate specifically adapted for a particular bone
  • Y10S606/906—Small bone plate

Definitions

• the present invention relates to a material intended to correct the deformations of certain long bones, in particular the small long bones of the human body.
• the material according to the invention makes it possible to correct in particular the deformations of the first radius of the foot, mainly in Hallux Valgus.
• the first ray of the foot comprises three successive long bones articulated to each other, namely the first metatarsal, the first phalanx and the second phalanx.
• a Hallux Valgus deformation is an excessive angulation of the first radius of the foot, with an internal apex.
• a staple-plate for osteosynthesis for tibia or femur head described in document OA-94 02073.
• This device comprises a rigid body, a priori non-deformable, curved in S and integral at its two ends of two divergent teeth pins causing compression of the bone fragments on either side of the fracture line.
• the correction possibly obtained is independent of the shape of the rigid body and depends only on the angle of the angular osteotomy performed before penetration of the pins. Knowing that it is always difficult to carry out a precise osteotomy angle, the device therefore does not easily allow precise angular correction to be made.
• the device provides compression of the bone fragments, so that it is not suitable for maintaining an internal opening osteotomy.
• a plate-blade adapted for angular correction of the tibia.
• the device is suitable for the sole correction of the tibia, and is not suitable for other bones such as the long bones of the foot.
• the body being very rigid to support the significant mechanical stresses of the tibia, it is not deformable and has a fixed angle between the blade and the body.
• the angular correction of the osteotomy is therefore adjusted by varying the angle of penetration of the blade into the epiphyseal bone during placement, and gradually bringing the diaphyseal portion of the bone into contact with the body. Such an adjustment is delicate and awkward.
• the device is not suitable for the treatment of small long bones because the distance between the penetration orifice of the blade and the osteotomy line is then too small to allow variations in the angle of penetration. As soon as you want to choose an acute penetration angle, the blade would indeed meet the osteotomy line.
• EP-A-0 552 109 describes a staple for pinning a ligament to a bone. Such a device does not allow angular corrections, and the proximity of the pins and wedging fingers makes it unsuitable for maintaining an osteotomy.
• Document FR-A-2 362 • 616 describes a staple plate to be shaped into a tube, for the rectilinear maintenance of a bone. This device does not allow angular corrections.
• the problem proposed by the present invention is thus to define a material suitable for the easy and effective correction of bone deformations of small long bones, in particular deformations of the first radius of the foot in Hallux Valgus J
• the material must itself ensure the correction precise angular, without the need to respect great precision in the osteotomy to be performed. And the material must then ensure correct angular maintenance of the successive portions of bone after osteotomy, without weakening the bone, in particular making it possible to maximize the distance between the osteotomy and the anchoring elements penetrating into the bone.
• the material according to the invention must also be usable for the correction of deformations associated or not in the vertical plane, such as the lowering or raising of the metatarsal, or in the rotary plane affecting supination or pronation, or in the length by shortening or lengthening. It can also be used for the correction of other metatarsals, especially in disorders of rotation of the fifth metatarsal, or for the correction of other small long bones such as the bones of the hand.
• the equipment according to the invention for the correction of bone deformations of long bones comprises at least one bone maintenance device comprising:
• a rigid elongated body comprising two main rectilinear integral segments and connecting angularly to each other by an angular connection zone at an angle (A) adaptable to be substantially equal to the angular correction to be made on a bone, said body being of a material and in a form admitting without rupture and retaining permanent angular deformations in the angular connection zone,
• - first anchoring means provided on the first main segment of the body for fixing transversely in the bone in a direction making a determined angle (B) such as a right angle with the longitudinal axis of the bone, the first anchoring means comprising at least one pin developing in a direction generally making said determined angle (B) to the longitudinal axis of the first main body segment, - second anchoring means, provided on the second main segment of the body and adapted to be fixed transversely in the bone during a subsequent step, after fixing the first anchoring means, so that, after opening or closing osteotomy performed between two adjacent portions of the bone at an angle substantially equal to the correction to be obtained, and after anchoring the first means of anchoring the device at the determined angle (B) in the bone by placing the angular connection zone opposite the zone osteotomy, the device determines the angular offset between the two adjacent bone portions, the subsequent anchoring of the second anchoring means making it possible to fix the angular offset.
• the second anchoring means comprise at least one bone screw adaptation hole
• the anchoring means are. adapted to penetrate the bone by projecting from the concave face of the body.
• Such a device comprising two main body segment pins is then a staple plate suitable for the correction of deformations of the first metatarsal.
• Such a device comprising a single main body segment pin is then a staple plate suitable for the correction of deformations of the fifth metatarsal.
• an additional device having a rigid elongated body composed of a first straight main segment and a second straight main segment connecting to each other by an angular connection zone and in which:
• first anchoring means comprise a first group of two pins offset longitudinally on the body
• Second anchoring means comprise a second group of two pins offset longitudinally on the body, - the pins protrude from the convex face of the body.
• This additional device is then a clip adapted to the correction of deformations of the first phalanx.
• FIG. 1 illustrates, in top view, the skeleton of a foot having a Hallux Valgus type deformation
• - Figure 2 illustrates, in top view, the skeleton of the foot of Figure 1 after correction of the first radius of the foot using the equipment according to the present invention; the figure also illustrates the correction of the fifth metatarsal;
• - Figure 3 is a perspective view of a device according to an embodiment of the present invention.
• FIG. 4 illustrates in perspective a variant of the embodiment of the device of Figure 3;
• FIG. 5 illustrates in perspective a second variant of the device of Figure 3, adapted for the correction of the fifth metatarsal;
• FIG. 6 is a perspective view of a complementary device according to an embodiment of the invention
• FIG. 7 is a top view of a drilling guide according to the invention, suitable for making the tunnels drilled in the bone for the engagement of the first anchoring means;
• - Figure 8 is a side view of the drilling guide of Figure 7;
• - Figure 9 is a front view of the drilling guide of Figure 7;
• FIG. 10 is a side view of a protractor according to the invention, used intraoperatively to measure the desired angular correction angle on the bone;
• - Figure 11 is a top view of the protractor of Figure 10;
• - Figure 12 is a side view of a first bending device element according to the invention, to give the staple plate an angle according to the angular correction to be made on the bone;
• FIG. 13 is a top view of the first bender device element of Figure 12; and FIG. 14 is a side view of the second element of the bending device, used in association with the first element of FIG. 12 to give a staple plate a desired correction angle.
• the device comprises a rigid elongated body 1, comprising a first main segment 2 rectilinear and a second main segment 3 rectilinear integral with each other and angularly connecting to each other by an angular connection zone 4 at an angle A chosen equal to the angular correction to be made on a bone.
• First anchoring means 5 are provided on the first main segment 2 of the body 1,.
• the first anchoring means 5 comprise two pins 6 and 7, integral with the body 1, parallel to each other and generally oriented at a determined angle B such as a right angle relative to to the longitudinal direction of the first main segment 2, projecting from the concave face 8 of the body 1.
• the two parallel pins 6 and 7 are offset laterally with respect to each other and develop. according to a plane generally forming the determined angle B such as a right angle relative to the longitudinal axis of the first main segment 2.of body 1.
• the pins 6 and 7 can thus be fixed in the bone during a first fixing step.
• Second anchoring means 9 are provided on the second main segment 3 of the body 1, to be fixed transversely in the bone during a subsequent step, after fixing the first anchoring means 5.
• the second anchoring means 9 comprise a hole 10 for the adaptation of a bone screw head, the rod of which is intended to protrude from the concave face 8 of the body 1.
• the hole 10 presents by example a portion 11 in a spherical crown, for the adaptation of a head with spherical bearing of bone screw.
• the body 1 may advantageously comprise, in the vicinity of the bone screw adaptation hole 10, a secondary hole 12 for the passage of a removable pin allowing a temporary fixing or a reinforcement of the fixing of the device on the bone.
• the angle A can advantageously be equal to approximately 15 °. However, this angle may be different, depending on the correction to be obtained on the metatarsus verus.
• the possibility of deforming the is advantageously provided.
• the body 1 is made of a material which admits without breaking and retains permanent angular deformations in its angular connection zone 4.
• Biologically compatible stainless steel can be used.
• the body is also given a shape allowing permanent angular deformations: in the angular connection zone 4, the body has a thickness E substantially less than its width L1.
• the body 1, in this embodiment of Figure 3, has the shape of an elongated plate, the width L1 is substantially greater than the thickness E. Its length L2 is between one third and half the length of the bone it is intended to correct. For an application to the correction of a first metatarsal, the length L2 is advantageously between 2 and 3 cm approximately.
• the device comprises the same elements, as in the embodiment of FIG. 3, and these common elements are identified by the same reference numbers.
• the body 1 is a rectilinear plate, and its angular connection zone 4 remains to be formed at an appropriate angle by a bending device, depending on the angular correction of the bone to be obtained.
• the device also comprises means similar to those of the embodiment of Figure 3, and these similar means are identified by the same reference numerals.
• the body 1 is also a rectilinear plate, and the angular connection zone 4 remains to be formed at an appropriate angle by a bending device.
• the first anchoring means 5 comprise a single pin 6.
• a device is thus produced which is adapted in particular to the correction of the fifth metatarsal.
• the pin or pins of the first anchoring means 5 make with the first segment 2 of the body 1 a determined angle.
• the invention provides a drilling guide making it possible to drill penetration holes in the bone making the same angle B with respect to the longitudinal direction of the bone.
• a drilling guide is used as illustrated in FIGS. 7 to 9, comprising a body 40 with a lower support face 41 that is plane, held by a transverse handle 42, and provided with two through holes 43 and
• the angle B is a right angle. Alternatively, you can tilt the holes 43 and 44 to make an angle B other than 90 °.
• a longitudinal hook 45 makes it possible to wedge the positioning of the piercing device relative to one end of the bone.
• a graduation 46 at the end of the body 40, allows adjustment of lateral orientation of the bone parts on either side of an osteotomy, if necessary.
• a protractor as illustrated in FIGS. 10 and 11 can be used.
• This protractor comprises a body 47 integral with a handle 48 and comprising a rod 49 which is just introduced into one of the tunnels previously drilled in the bone using the drilling guide shown in FIGS. 7 to 9.
• a feeler 50 is articulated on the body 47 along a transverse axis 51.
• the body 47 is applied to the proximal part of the bone after osteotomy, and the probe 50 is applied to the distal part of the bone by adjusting Tilting the distal portion of the bone to achieve the desired correction.
• a bending device is used to shape the body 1 according to the angle Chose.
• the bending device comprises a first element, illustrated in FIGS. 12 and 13, provided with a handle 53 and a body 54.
• the body 54 comprises a large transverse groove 55 and a small longitudinal groove 56, shaped to allow the lateral insertion of the end of the staple plate body comprising the pins of the first anchoring element 5.
• the pins are introduced into the large transverse groove 55, while the end of the body 1 passes through the small longitudinal groove 56.
• a lateral flange 57 carrying an angular graduation 58 makes it possible to measure the angle A of angular connection of the body 1.
• a second element is used as illustrated in FIG. 14, itself comprising a handle 59 and a body 60 provided with a longitudinal slot 61.
• the second main segment 3 of the body 1 is introduced longitudinally into the slot 61, in opposition to the first main segment 2 of body 1 introduced into the first element illustrated in FIGS. 12 and 13.
• FIG. 6 we. shows a complementary device of the invention, having a rigid elongated body 100, comprising a first main segment 2 rectilinear and a second main segment 3 rectilinear connecting angularly. one to the other by an angular connection zone 4 forming an angle substantially equal to the angular correction to be made on a bone, for example equal to approximately 10 °.
• the first main segment 2 comprises first anchoring means 5
• the second main segment 3 comprises second .. anchoring means 9.
• the first anchoring means 5 comprise a first group of. two pins 13 and 14, offset longitudinally on the body 100.
• the end pin 13 is longer than the intermediate pin 14.
• the second anchoring means 9 comprise a second group of two pins 15 and 16, offset longitudinally on the body 100, the end pin 16 being longer than the intermediate pin 15.
• the pins 13, 14, 15 and 16 can advantageously be parallel to each other, and protrude from the convex face 17 of the body 100.
• the body 100 has a length advantageously between one third and half the length of the bone to be corrected.
• the length of the body 1 is advantageously between 1 and 2 cm approximately.
• the material used for the correction of the deformations of the. foot advantageously comprises a first device such as a staple plate 21 according to the embodiment of Figures 3 to 5, shaped for adaptation to the first metatarsal 18 of the first radius of the foot, and a second complementary device such as a clip according to the embodiment of the complementary device of FIG. 6, shaped for adaptation on the first phalanx 19 adjacent to said first metatarsal 18.
• Figure 1 illustrates a foot having a Hallux Valgus to correct the first radius of the foot is formed by the first metatarsal 18, the first phalanx 19 and the second phalanx 20, achieving a buckling of the first radius of the foot resulting in an internal angular projection of the metatarsophalangeal.
• the same foot has been illustrated after correction by the material according to the invention: the first metatarsal 18 is corrected by a staple plate 21 according to the embodiment of FIGS. 3 to 5 of the invention, while the first phalanx 19 is corrected by a clip 22 according to the embodiment of the complementary device of FIG. 6 of the invention.
• the operating times are as follows:
• an epiphyso-diaphyseal osteotomy 23 of external opening is performed with a saw, respecting the external cortex, by providing an angular bone supply of angle equal to the correction to be obtained;
• two parallel tunnels are drilled in the proximal spongy epiphyseal part 24 of the first metatarsal 18, the tunnels having a direction making an angle B with 10
• the tunnels being positioned so that the angular connection zone 4 of the staple plate 21 is substantially opposite the osteotomy 23;
• the staple plate 21 is placed by inserting the pins of the first anchoring means 5 in the tunnels drilled in the proximal part 24 of the first metatarsal 18, the body 1 of the staple plate 21 being previously angled using the bending device for obtaining the desired correction as previously measured from a laden foot radio, and / or intraoperatively using the protractor applied to the bone after osteotomy; the staple plate 21 is temporarily immobilized by a diaphyseal pin 25 introduced through the appropriate hole 12 as illustrated in FIGS. 3 to 5;
• the staple plate 21 is permanently fixed by a bone screw 26 in the diaphysis of the first metatarsal 18;
• the angulation of the bone subtraction is determined by a cutting guide whose the angle can be, for example, approximately 5 °, 10 ° or 15 °.
• the closure is stabilized by the clip 22 according to the embodiment of the complementary device of FIG. 6, constituting a clip with four pins of unequal length, two pins going into each bone fragment to avoid any phenomenon of connecting rod.
• This clip 22 is mj.se in place after a bone pre-drilling thanks to a suitable ancillary.
• the ancillary and the clip 22 have the particularity of having an appropriate angulation which allows them to follow the shape of the diaphysis after bone closure during application.
• the pre-drilling is positioned so that the staple is placed with its angular connection zone 4 substantially opposite the osteotomy 27.
• the staple 22 can be used independently of the use of a staple plate 21 .
• FIG. 2 the correction of rotation of the fifth metatarsal 28 has also been illustrated by a staple plate 29 with a pin according to the embodiment of FIG. 5. After intermediate osteotomy 30 and correction in axial rotation of the two sections of fifth metatarsal 28 relative to each other, the staple plate 29 is anchored by its single pin 6 in the first segment, and fixed to the second segment by a bone screw 31.

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• Health & Medical Sciences (AREA)
• Orthopedic Medicine & Surgery (AREA)
• Surgery (AREA)
• Life Sciences & Earth Sciences (AREA)
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• Animal Behavior & Ethology (AREA)
• Engineering & Computer Science (AREA)
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• Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
• General Health & Medical Sciences (AREA)
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• Orthopedics, Nursing, And Contraception (AREA)
• Control Of Metal Rolling (AREA)

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Cited By (8)

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Citations (9)

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• 1994
  • 1994-04-27 FR FR9405332A patent/FR2719211B1/fr not_active Expired - Fee Related
• 1995
  • 1995-04-26 KR KR1019960705988A patent/KR970702014A/ko not_active Application Discontinuation
  • 1995-04-26 AT AT95918643T patent/ATE203149T1/de not_active IP Right Cessation
  • 1995-04-26 CA CA002188659A patent/CA2188659A1/fr not_active Abandoned
  • 1995-04-26 DE DE69521798T patent/DE69521798T2/de not_active Expired - Lifetime
  • 1995-04-26 US US08/732,318 patent/US5810822A/en not_active Expired - Fee Related
  • 1995-04-26 WO PCT/FR1995/000544 patent/WO1995028887A1/fr active IP Right Grant
  • 1995-04-26 ES ES95918643T patent/ES2161289T3/es not_active Expired - Lifetime
  • 1995-04-26 JP JP7527416A patent/JPH09512189A/ja active Pending
  • 1995-04-26 EP EP95918643A patent/EP0757545B1/de not_active Expired - Lifetime

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